Since there could be a number of adjustments required, it is best if you prepare the logo and then upload it to your media library, get the URL and then post the URL here for use to work with. Right now the title and tagline area have a height of about 80px, but that can be adjusted. I would probably try and stay at 100px tall if you can. Also, are you also wanting to do away with the tagline/site description below the title?

I’m not seeing any of the changes on your site, so it is difficult for me to determine what would have to be done. Something like this will probably do it but you will have to mess with the left margin value to get it where you want it (100px is just a placeholder value).

Have used your code on my blog: http://hello-poppet.com and it works great. The only other thing I’d like to do now is remove the search fields, either one. Just so there’s no double up, what’s the easiest way to do that?